Emerald Hill Zone

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Sonic the Hedgehog 2 (16-bit)
Emerald Hill Zone
Emerald Hill Zone
First level, Sonic the Hedgehog 2
Number of Acts: 2
Level theme: tropical island
Boss: Drill Eggman
Maximum rings, Act 1: 226 + 70
Maximum rings, Act 2: 225 + 60
Non-English names:
Chemical Plant Zone
For theSonic Drift 2 level, see Emerald Hill (Sonic Drift 2).

Emerald Hill Zone is the first zone in Sonic the Hedgehog 2, and is the analogue of Green Hill Zone. It fills the Tropical Island theme for the game.

The zone contains bridges, waterfalls, loops, and flowers like the standard Green Hill Zone. However, it doesn't have totem poles. It introduced a new corkscrew path feature, which became a token symbol for the game, and was later reused in future levels such as Sonic Advance 2's Leaf Forest. There are enough checkpoints in the two acts of this zone that it is possible to visit all 7 Special Stages.

A slightly modified version of Emerald Hill Zone's art is also used in Hill Top Zone, with different coloration. No one knows why for sure, but Hill Top Zone and Emerald Hill Zone were developed during the same time which can be proven by playing the Simon Wai prototype where they are both completed.


Speed through this tropical bayside resort with palm trees, loop-de-loops and corkscrew speedways. Watch out for monkey-business!

Sonic 2 US Manual, p. 12

Visually speaking, through all three games, we always start with an island. At the time, we were developing in San Francisco, and south of there was a town(?) called Emerald Hill. We were doing a location test at a shopping center there when we saw it, and since it was a Green Hill-like name we thought well, let's use it in the game!

Yuji Naka, Sonic Jam Strategy Guide


  • Coconuts - Monkey enemy, throws coconuts at you from up a tree.
  • Buzzer - Wasp enemy, flies along and stops to fire a missile at you, then continues flying.
  • Masher - Piranha enemy, jumps vertically from inside waterfalls.

Technical information

Value Description
00 Level Value
$2A22 EHZ Palette (04, 05, 07, 0D)
$C57E EHZ layer deformation info
$3FF94 EHZ animated pattern load cue
$40372 EHZ, HTZ misc sprite mappings
$41D2E EHZ/01/02/03/DEZ object debug list
$44E50 EHZ and HTZ primary 16x16 collision index
$44F40 EHZ and HTZ secondary 16x16 collision index
$45AC4 EHZ act 1 level layout
$45C84 EHZ act 2 level layout
$4E74 EHZ 16x16 block mappings
$95C24 EHZ/HTZ main level patterns
$98AB4 HTZ pattern suppliment to EHZ level patterns
$99D34 EHZ/HTZ 128x128 block mappings
$E4344 EHZ act 1 ring locations
$E456A EHZ act 2 ring locations
$E684A EHZ act 1 sprite locations
$E6B7A EHZ act 2 sprite locations


Sonic the Hedgehog 2 (16-bit)
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